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In a titration of HCL, I have a molarity of 0.991 NaOH and a volume of 7.6 mL to reach an equivalence point for the titration. I need to figure out the number of moles of NaOH from these figures. Pl
A mixture of these these gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of
If technetium-99 has a half-life of 6.0 hours, what percent of an administered dose of 100 mg of technetium-99 remains in the patient's body after 48 hours?
Silicon Carbide, which has the emperical formula: SiC, melts at 2830 deg C. and is nearly as hard as boron nitride and diamond. Which category of substances does it most likely fit under?
What is the side reaction that occurs or what side products are generated during a thiamine catalyzed benzoin condensation reaction
When trimethylamine, (CH3)3N, dissolves in water, it partially ionizes, producing the trimethylammonium ion, (CH3)3NH+. What effect, if any, would dissolving trimethylammonium chloride [(CH3)3NHCl], a
The temperature of a 500.mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant?
A 0.9157-g mixture of CaBr2 and NaBr is dissolved in water, and AgNO3 is added to the solution to form AgBr precipitate. If the mass of the precipitate is 1.6930 g, what is the percent by mass of Na
A thin lead apron is used in dental offices to protect patients from harmful X rays, If the sheet measures 75.0 cm by 55.0 cm by 10.cm, and the density of lead is 11.3 g/cm^3, what is the mass of th
You need to produce a buffer solution that has a pH of 5.23. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acet
The mass of a proton is 1.007825 amu and the mass of a neutron is 1.008665 amu. What is the nuclear binding energy of 1 atom of 210Bi, which has a mass of 209.9891 amu?
Any change in the volume of the solution due to the addition of solid potassium formate is insignificant. (Ka for HCOOH = 1.8 x 10^-4)
A saturated solution of silver chromate (Ag2CrO4) was found to have a CrO4^2- ion concentrate of 3.2*10^-4 M at 25 degrees C.How could you increase the solubility of the salt?
You have a 5M stock solution of sodium hydroxide. Your supervisor tells you to make up 1 liter of a 1M solution of sodium hydroxide for an experiment she needs for an experiment. How would you make
Why are much larger quantities of AlCl3 required for Friedel-Crafts acylation reactions than for alkylation reactions?
Give the complete mechanism for the formation of dibenzalacetone, starting from benzaldehyde and acetone. Make sure to show the flow of elections by using curved arrows, as well as all charges and l
NH4NO3 decomposes according to the equation...What pressure, in torr, will develop in a 50 mL container at 800 Celsius if 34.5g of NH4NO3 decomposes?
Question: Technetium-99 is widely used to diagnosis in medicine. Its half-life is 6.02 hours. A sample prepared in the early morning for use that day had an activity of 4.59 ?Ci. What will its activ
A gas sample is heated from -20.0oC to 57.0oC and the volume increased from 2.00L to 4.50L. If the initial pressure is 0.126 atm, what is the final pressure?
If a container is composed of H2, N2, and O2 gas with the partial pressures being .146 and .572, respectively, what is the partial pressure of O2?
Predict whether or not a precipitate will form upon mixing 75.0 ml of a NaOH solution with pOH=2.58 with 125.0ml of a 0.018 M MgCl2 solution. Identify the precipitate, if any.
Photoionization of a diatomic molecule produces a singly charged cation. For the molecules NO, calculate the bond order of the neutral molecule and the lowest energy cation.
One of the allotropes of sulfur is the orthorhombic form, formula S8 (8 is a subscript), which is a brittle, yellow solid. It does not conduct electricity. this form is stable below 94.5 deg C. It d
Determine the pH of the solution formed when 500.00 mL of 2.35 x 10-3 M tetrodotoxin is mixed with 500.00 mL of 2.00 x 10-6 M HCl. Tetrodotoxin (HC11H16N3O8) is a weak monoprotic having a Ka = 1.7*10-
What is the initial temperature (°C) of a system that has thepressure decreased by 10 times while the volume increased by 5times with a final temperature of 150K?